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Control
Measures for Hoary Cress
Alias: Cardaria draba
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| Mechanical
Control: |
- Small
infestations can be controlled by digging and complete plant removal
within a few days after plant emergence – for two to four years.
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| Cultural
Control: |
- Planting
competitive legumes such as Alfalfa can reduce Hoary Cress.
- Moderate
Grazing by sheep will provide some control by lowering weed densities
and preventing flowering.
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Chemical
Control:
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Escort
Rate: 1
ounce per acre
Time: Apply
at pre-bloom in early spring and to regrowth in fall.
Remarks: Use of Surfactant will increase effectiveness.
Caution: Apply to non crop sites. Follow label recommendations and precautions.
Do not contaminate water. |
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Telar
Rate: 1
ounce per acre
Time: Apply to pre-bloom stage in spring
or to rosettes in the fall.
Remarks: Use of Surfactant will increase effectiveness.
Caution: Apply only to non-crop sites. Follow label recommendations and precautions.
Do notcontaminate water. |
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| Rates
for 3-4 Gallon Back Pack Sprayer/Escort or Telar: |
- Add ½ ounce of Escort or Telar to 64 ounces of water plus an
ounce or two of Surfactant, plus 1 teaspoon household ammonia (the ammonia
will provide complete mixing (solubilization) of Escort or Telar). Stir mixture, add 8 ounces of this mixture
and 3-4 gallons of water in the sprayer.
(Rate is approximately 1 ounce per acre when spraying roughly
2,000 square feet.) Note: Mixture is effective for 70 hours. Do not mix more than you can use in 70 hours
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*NOTE: 8
oz. = ½ pint or 1 cup
1
oz. = 2 tablespoons or 1/8 cup
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Cooperatively
prepared by the Lander County Conservation District and the Nevada Department
of Agriculture.
12/00
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